Operating method for display corresponding to luminance, driving circuit, and electronic device supporting the same

Abstract

A method for driving a display and an electronic device supporting the same are provided. The method includes determining a luminance setting of an output of a display panel; generating a gamma value corresponding to at least one sub pixel among sub pixels composing a pixel of the display panel when the luminance setting is equal to or lower than a specified value; and supplying the generated gamma value to the at least one sub pixel and at least one other sub pixel.

What is claimed is: 
     
       1. An electronic device comprising:
 a display panel; and 
 a driver circuit configured to drive the display panel, 
 wherein the driver circuit includes:
 a gamma circuit including a plurality of gamma generation units; 
 a source driver including a plurality of amplifiers, each amplifier corresponding to a decoder; 
 one or more switches, one switch of the one or more switches configured to connect one of the plurality of gamma generation units to at least two decoders; and 
 a logic circuit configured to control the source driver and the gamma circuit, 
 
 wherein the logic circuit is configured to:
 control the one of the plurality of gamma generation units to generate a gamma value for one or more sub pixels, wherein the gamma value corresponds to a first color; and 
 control the one switch so that the generated gamma value is shared with a first decoder and a second decoder of the at least two decoders, when the display panel is set to output a luminance equal to or lower than a specified value, wherein the first decoder corresponds to a sub pixel of the first color and the second decoder corresponds to a sub pixel of a second color, 
 wherein the first color and the second color are different each other and each one comprises one of red, blue and green. 
 
 
     
     
       2. The electronic device of  claim 1 , wherein the gamma value corresponds to a red sub pixel, and the logic circuit is further configured to control the one or more switches so that the generated gamma value is shared with a first decoder corresponding to the red sub pixel and a second decoder corresponding to a blue sub pixel. 
     
     
       3. The electronic device of  claim 1 , wherein the gamma value corresponds to a blue sub pixel, and the logic circuit is further configured to control the one or more switches so that the generated gamma value is shared with a first decoder corresponding to the blue sub pixel and a second decoder corresponding to a red sub pixel. 
     
     
       4. The electronic device of  claim 1 , wherein the gamma value corresponds to a blue sub pixel, and the logic circuit is further configured to control the one or more switches so that the generated gamma value is shared with a first decoder corresponding to the blue sub pixel and second decoders corresponding to sub pixels of two other colors. 
     
     
       5. The electronic device of  claim 4 , wherein the logic circuit is further configured to:
 generate a digital gamma value corresponding to a red sub-pixel based on a blue gamma curve; and 
 supply the digital gamma value to a decoder or an amplifier corresponding to the red sub pixel. 
 
     
     
       6. The electronic device of  claim 4 , wherein the logic circuit is further configured to:
 generate a digital gamma value corresponding to a green sub pixel based on a blue gamma curve; and 
 supply the digital gamma value to a decoder or an amplifier corresponding to the green sub pixel. 
 
     
     
       7. The electronic device of  claim 1 , wherein the plurality of amplifiers includes a first amplifier corresponding to a sub pixel of a first color, a second amplifier corresponding to a sub pixel of a second color, and a third amplifier and a fourth amplifier corresponding to sub pixels of a third color,
 wherein the source driver further includes a second switch configured to connect an output terminal of the third amplifier with an output terminal of the fourth amplifier, and 
 wherein the logic circuit is further configured to: 
 deactivate the third amplifier and control the second switch so that an output of the fourth amplifier is supplied to the sub pixels of the third color. 
 
     
     
       8. The electronic device of  claim 1 , wherein the plurality of amplifiers includes a first amplifier corresponding to a sub pixel of a first color, a second amplifier corresponding to a sub pixel of a second color, and a third amplifier and a fourth amplifier corresponding to sub pixels of a third color,
 wherein the source driver further includes a second switch configured to connect an output terminal of the third amplifier with an output terminal of the fourth amplifier and a third switch configured to connect an output terminal of the first amplifier and an output terminal of the second amplifier, and 
 wherein the logic circuit is further configured to: 
 deactivate the first amplifier and the third amplifier, control the third switch so that an output of the second amplifier is supplied to the sub pixel of the first color and the sub pixel of the second color, and control the second switch so that an output of the fourth amplifier is supplied to the sub pixels of the third color. 
 
     
     
       9. The electronic device of  claim 1 , wherein the plurality of amplifiers includes a first amplifier corresponding to a sub pixel of a first color, a second amplifier corresponding to a sub pixel of a second color, and a third amplifier corresponding to a sub pixel of a third color,
 wherein the source driver further includes a second switch configured to connect an output terminal of the first amplifier and an output terminal of the second amplifier, and 
 wherein the logic circuit is further configured to: 
 deactivate the first amplifier and control the second switch so that an output of the second amplifier is supplied to the sub pixel of the first color and the sub pixel of the second color. 
 
     
     
       10. A method for driving a display, the method comprising:
 determining a luminance setting of an output of a display panel; 
 generating, by one gamma generation unit among a plurality of gamma generation units, a gamma value corresponding to at least one sub pixel among sub pixels composing a pixel of the display panel when the luminance setting is equal to or lower than a specified value; and 
 supplying the generated gamma value to the at least one sub pixel and at least one other sub pixel, 
 wherein the gamma value corresponds to a first color, and supplying the generated gamma value further comprises supplying the generated gamma value to another sub pixel composing the pixel. 
 
     
     
       11. The method of  claim 10 , wherein the gamma value corresponds to a first color, and supplying the generated gamma value further comprises supplying the generated gamma value to all the sub pixels composing the pixel. 
     
     
       12. The method of  claim 10 , wherein the gamma value corresponds to a red sub pixel, and supplying the generated gamma value further comprises supplying the generated gamma value to a red sub pixel and a blue sub pixel. 
     
     
       13. The method of  claim 10 , wherein the gamma value corresponds to a blue sub pixel, and supplying the generated gamma value further comprises supplying the generated gamma value to a blue sub pixel and a red sub pixel. 
     
     
       14. The method of  claim 10 , wherein the gamma value corresponds to a blue sub pixel, and supplying the generated gamma value further comprises supplying the generated gamma value to a blue sub pixel, a red sub pixel, and a green sub pixel. 
     
     
       15. The method of  claim 14 , further comprising:
 generating a digital gamma value corresponding to the red sub pixel based on a blue gamma curve; and 
 supplying the digital gamma value to a decoder or an amplifier corresponding to the red sub pixel. 
 
     
     
       16. The method of  claim 14 , further comprising:
 generating a digital gamma value corresponding to the green sub pixel based on a blue gamma curve; and 
 supplying the digital gamma value to a decoder or an amplifier corresponding to the green sub pixel. 
 
     
     
       17. The method of  claim 10 , wherein the display comprises a source driver including a first amplifier corresponding to a sub pixel of a first color, a second amplifier corresponding to a sub pixel of a second color, and a third amplifier and a fourth amplifier corresponding to sub pixels of a third color, and the method further comprises:
 deactivating the third amplifier; and 
 supplying an output of the fourth amplifier to the sub pixels of the third color. 
 
     
     
       18. The method of  claim 10 , wherein the display comprises a source driver including a first amplifier corresponding to a sub pixel of a first color, a second amplifier corresponding to a sub pixel of a second color, and a third amplifier and a fourth amplifier corresponding to sub pixels of a third color, and the method further comprises:
 deactivating the first amplifier and the third amplifier; 
 supplying an output of the second amplifier with the sub pixel of the first color; and 
 supplying an output of the fourth amplifier to the sub pixels of the third color. 
 
     
     
       19. The method of  claim 10 , wherein the display comprises a source driver including a first amplifier corresponding to a sub pixel of a first color, a second amplifier corresponding to a sub pixel of a second color, and a third amplifier corresponding to a sub pixel of a third color, and the method further comprises:
 deactivating the first amplifier; and 
 supplying an output of the second amplifier to the sub pixel of the first color. 
 
     
     
       20. An electronic device comprising:
 a display panel; and 
 a driver circuit configured to drive the display panel, 
 wherein the driver circuit includes:
 a gamma circuit including a plurality of gamma generation units corresponding with sub-pixel colors of a pixel; 
 a source driver including a plurality of amplifiers corresponding with sub-pixel colors of the pixel; 
 a plurality of decoders corresponding with sub-pixel colors of the pixels; and 
 one or more switches configured to connect one of the plurality of amplifiers corresponding with one of the sub-pixel colors to one of the decoder corresponding with another one of the sub-pixel colors when the display panel is set to output a luminance equal to or lower than a specified value.